Where Is the Edge of the Solar System? An illustration of the solar system (not to scale), including the sun, inner rocky planets, asteroid belt, the outer gassy planets, and—beyond Neptune—the Kuiper ...

A supposed “planet nine” that lies hidden at the edge of our solar system could actually be something else entirely, ...

Scientists say they have found new evidence that there is a hidden planet in our solar system.

Researchers have found more evidence that there is an unknown planet in our solar system.

Voyager 1 suffered a glitch, and it's messages stopped making sense. But the NASA probe is once again sending messages to Earth that make sense.

Voyager 1 – and its sibling, Voyager 2 – were always meant to be a testament to humanity’s ingenuity. When they left Earth in the summer of 1977, they did so carrying a record that was supposed to be ...

As concerns about climate change and the depletion of non-renewable resources continue to grow, more and more homeowners are turning to alternative forms of energy to power their homes. One of the ...

Watch this video to find out more about the Earth, planets in our Solar System and other planets far off in outer space. From up here on the International Space Station I get a great view of Earth.

For years, some astronomers have been suggesting that unusual behaviour on the edge of our solar system is best explained by another, undiscovered planet. That helps explain the orbits of objects ...

Then it just kept going. It's now out beyond the edge of the solar system in the previously unexplored space between stars. And it still regularly talks to Earth. But in mid-November, it suffered ...